Outdoor lights have a reputation for being the thing you buy in a hurry at the end of a porch project, grab whatever's cheapest and bright enough to not trip on the steps, and that reputation is mostly earned. I've done that myself, more than once, and lived with the regret glowing above my own front door for longer than I'd like to admit. But a good outdoor light, chosen with a little patience, is one of the few things that changes how a house reads from the street and how a porch feels at ten at night, and that's worth more attention than most people give it.
If you've got nothing out there yet, start with one good fixture by the door you use most, a solid wall light with real metal and glass rather than plastic standing in for both, because that's the one you'll look at every single evening coming home. Check it in the shop with your hands, not just your eyes, feel the weight of the housing, see if the seams where the glass meets the metal look sealed or just glued, and on delivery day open the box before the delivery person leaves, because a cracked lens or a missing gasket is a lot easier to sort on the spot than three weeks later when you've already drilled the holes. Ask about the rating for wet locations if it's going anywhere rain can reach it sideways, which on most porches is everywhere. Solar versions are lovely for a path or a line of steps, but test them somewhere shaded first, because a light that needs full sun all day to give you a dim glow at nine is a light that's going to disappoint you by October.
Metal fixtures, left alone, will do something a plastic one never will, they'll earn a surface over a few seasons of weather, going matte, sometimes freckling a little at the edges, and that's not a flaw to fight with a wire brush, it's the finish arriving. A light wipe with a damp cloth a few times a year, and leave the hardware alone otherwise. Bulbs are the part that actually fails, so buy a spare the same day you buy the fixture, because nothing's worse than a dark porch and a Sunday with no hardware store open. They sit easily against brick, weathered wood, painted clapboard, pretty much anything that's had a season or two on it, less happily against anything trying too hard to look new.
What they won't do is fix bad bones. No fixture, however handsome, makes a sagging porch or a dark, charmless entry look loved. That part's still on you.